How to get uv map for mesh faces?
In the properties editor, in the mesh tab, UVs panel, you can manage UVs of your mesh as well as creating several UVs.
Note that one UV map in the list has the camera incon turned on: it means that UV map is used by default by your image texture nodes and by your Texture Coodinates nodes.
If you want to manually select a particular UV map from your shader, you will need to use the UV Map node.